 With an estimated area of 1,282.19 square kilometers, Merti has an estimated population density of 105.3 people per square kilometer, which is less than the Zone average of 132.2.The 1994 national census reported a total population for this woreda of 93,895, of whom 47,201 were men and 46,694 women; 14,575 or 15.52% of its population were urban dwellers at the time.The two largest ethnic groups reported in Merti were the Oromo (71.29%), and the Amhara (26.3%); all other ethnic groups made up 2.41% of the population.